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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1354 | break; |
| 1355 | case 'count': |
| 1356 | $orderby = ''; |
| 1357 | $order = ''; |
| 1358 | $selects = array('COUNT(*)'); |
| 1359 | } |
| 1360 | |
| 1361 | $_fields = $fields; |
| 1362 | |
| 1363 | $fields = implode(', ', apply_filters( 'get_terms_fields', $selects, $args )); |
| 1364 | |
| 1365 | $join = "INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id"; |
| 1366 | |
| 1367 | $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' ); |
| 1368 | $clauses = apply_filters( 'terms_clauses', compact( $pieces ), $taxonomies, $args ); |
| 1369 | foreach ( $pieces as $piece ) |
| 1370 | $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : ''; |
| 1371 | |
| 1372 | $query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits"; |